Pressure and sealing device for containers



g- 28,.1934- 'w. c. PARROTT 1,971,727

PRESSURE AND SEALING DEVICE FOR CONTAINERS Filed July 21, 1933 2Sheets-Sheet l Aug. 28, 1934.

w. c. PARROTT 1,971,727

PRESSURE AND SEALING DEVICE FOR CONTAINERS Filed July 21, 1933 zsheetssheqt 2 E Patented 1 934 PA ENT orncs 1.9711121 'rasssuaa Ann sesamensvroa roa commas William 0. Psrrott, sumac, com. Application July 21,less, Serial No. 681.614

My invention relates to a pressure and device for containers and Ideclare the following to be a full,. clear, concise and exactdescription thereof sufiicient to, enable anyone skilled in the [art towhich it appertains to make and usethesame, reference being had/to theaccompanying drawings in which like reference characters refer to likeparts throughout.

I The object of the invention is to provide a lo pressure and sealingdevice for use in insecticide sprayers, lacquer, spraying tanks, beercontainers such as thermo-jugs, steel drums and barrels,

which utilizes air pressure for forcing the spray therefrom, that willbe perfectly safe against explosions.

Heretofore in sprayer-s of the type herein described, the top portionhas given way under force of the air pressure, from'within thecontainer, 1 flown off into so injured the user. i I

One of the particular objections is to so construct the sprayer that itstop and other portions will withstand the internal pneumatic pressureand not be able to fly off into space to the conseas quent injuring ofpersons.

In the present construction the top is made to seal the opening fromwithin the container.

Another object is to provide alarger opening in the top for filling andcleaning the interior of go the container.

To this end, the top portion is secured from beneath. The object will beunderstood by referring to the drawings in which:

I Fig. 1 is a sectional view of'the device, parts broken away.

Fig. 2 is a detail view enlarged, showing a perspective of a memberemployed.

Fig. 3 is a detail enlarged view showing the 40. oval closure member.

Fig. 4 is a detail enlarged view showing the *locking bridge.

Fig. 5 is a sectional view of the threaded memhere for tightening theclosure member.

5 Fig. 8 is a perspective view showing the upper part of the containerwith the oval sealing closure in place.

' Fig. '1 is a top plan view of the device..

Fig. 8 is an enlarged detail view showing a perso spective of a handleand immediate parts employed.

Referring more particularly to the device, it embodies a cylindrical,seamless brass tank of drawn metal 1, the bottom portion of said tank.55 1 is concaved at 2 to allow for yielding under space and often timesseriouslydisposed 5 Claims. (Cl. 221-77) sealing excessive pneumaticpressure within the container formed by easing 1. Rings 3, 3 areattached to the outer surface of tank 1 by means of plates 4 and rivets5, whereby to suspend the casing in a convenient location. W

The upper portion of tank 1 has formed therein an annular indentation 6which provides a stop for the lower peripheral 'edge 7 of top 8. Top 8is soldered or welded at 9 to the bent over upper part of tank 1. Alarge central oval shaped to aperture 13 is formed in top 8. Aperture 13may be rectangular or any shape in which one dimension is longer thanthe other.

There is also a small aperture formed therein at 14 for the rlvetting ofnipple 15 which has a 7.0 serrated or grooved upper end at 13 to gripand hold a rubber tube, not shown. A pipe is connected on the inside ofthe container with nipple 15 so as to communicate with its passageway.Said pipe 20 extends down into tank 1 and is 76 fastened by ring 22 toone side thereof. Its lower end 23 reaches very nearly the bottomportion 2 in order to insure emptying the contents of the container whenthe sprayer is in use.

The means for forcing the solution out of oas- 80 ing 1 in the form of aspray embodies a pump 25 within casing 1. Said pump 25 has a cylindricalcasing 26 in which slides a reciprocating valve or piston 27 fastened topiston rod 28. The upper end of said rod 28 has formed integral 86therewith handle 29 hereinafter described. The lower side of said casing26 has at one part a depression formed at 30 to allow for the escape ofair past valve'27 when in lowermost position, for otherwise the confinedair below the piston would prevent the closing of a one way valve 31hereinafter mentioned.

Moreover, a valve casing 32 is attached to the lower surface 33 of pump25. Valve casing 32 has a seat at 34 for one-way spring pressed valve31. A cap 36 having apertures 37 therein is screw threaded to the lowerpart of casing 32. Spring 38 disposed between valve 31 and cap 36 holdsvalve 31 upon its seat 34. Lower reduced end 39 of valve 31 has asliding bearing in a cap 36.

When piston 27 is forced downward, valve 31 will be forced downwardlikewise to permit the air under pressure to move out through apertures37 into the chamber of easing 1 and thereby build up a pneumaticpressure therein. Said valve 31 will automatically close as piston 26moves upward to prevent the escape of said air.

Pump casing 26 is held in a detachable manner in central position withintank 1 by the following therewith. An annular groove mechanism embodyinga member 40 having an upstanding cylindrical part 41 with externalthreads 42 formed on its outer upper surface and a lower or oval shapedflange 45 formed integral 46 is made in said flanged portion 45 for thereception of a sealing or rubber washer or gasket 48. Said gasket 48rests against the under-surface of top portion 8 adjacent to the edge 49thereof to aid in sealing the joint. Moreover, an annular projection orring 50 is made by indentation in the lower surface of top 8. Saidannular ring 50 embeds itself in gasket 48 to aid further in forming anair tight joint when the parts are assembled.

The neck piece 40 is held in position by means of a narrow co-operatingbridge60. The ends of bridge piece 60 are bent at an angle, whereby thecentral part 61 and extreme horizontal end parts 62, 62 are in differentplanes. End parts 62, 62 rest upon the upper surface of the innerperiphcry of top 8 when the parts are assembled. Said bridge piece 60 isprojected through open recesses 63, 63 formed at diametrically oppositelocations in the cylindrical part 41 of member 40. An aperture 64 ismade in the enlarged central portion of throat piece 60 to allow for thereciprocating 'movement of piston rod 28.

Furthermore shoulders or elevations 65A, 65A are formed in the topsurface of cover 8 at diametrically opposite locations for thedisposition of the respective end- 62, 62, of bridge piece 60, wherebyto anchor the same when assembled.

A cap member 66 is mounted to the external threads 42 of cylindricalpart 41 of member 40. Said cap 66 has a central aperture for a purposehereinafter mentioned. It holds in place, however, a washer 66-Adisposed between the under surface of cap 66 and the upper edge of part41 ofmember 40.

In order to prevent washer 66-A from turning, a part 6'7 is bentdownwards to engage a correspondingly formed recess 68 in part 41.

A bushing 69 having internal threads is formed integral with washer 66A.The internal threads of bushing 69 are engaged by the complementarythreads of member '70 which is free to turn independent of piston rod 28through which it projects. The lower end of member '70 is reduced indiameter for mounting bridge piece 60 heretofore mentioned. Bridge piece60 is mounted however so that member '70 can turn independent of bridgepiece 60. A locking ring or nut '71 is screw mounted to the lower end ofmember '70 to hold bridge piece 60 in place.

The upper part of member '70 is formed with an overspreading flange '72having an irregular periphery with recesses '73, '73 diametricallyopposite each other to allow a passageway for the projection of L shapedhook members '74, '74 made integral with and depending from disk '75that forms the lower part of handle '76.

When L shaped hooks '74, '74 are projected with their lower ends belowflange '72, they will, on handle '76 being turned, engage thediametrically opposite shoulders '77, '77 formed on flange '72, wherebyto cause member '70 to be turned in one direction, or when handle '76 isturned in the opposite, engage shoulders '78, '78 to cause it to turn inthe other. Furthermore, recesses '79, '19 are made in the under side offlange '72, whereby to retain the lower horizontal parts 80, of hooks'74, '74 when using handle 29 as a carrier for casing 1. The elevations81, 81 aid in the formation of recesses '79, '79.

In operation, casing 1 is usually suspended by rings 3, 3 from the wallor other convenient location.

When using the device as a sprayer, handle 29 is turned until L shapedhooks '74, '74 are opposite recesses '73, '73 and then pulled upward torelease handle 29 from flange 29 can be moved up and down now "toactuate piston 2'7 in pump casing 260i pump 25. Its actuation will forceair into casing 1 through one way valve 31 which will cause a pressurethereinthat will force the solution up through pipe 20 and out throughnipple 15 and through a rubber hose and spraying nozzle, not shown.

Whenever necessary to refill tank spraying solution or for purposes ofcleaning the interior. the following parts can be withdrawn bodily,namely, pump 25 and its connected parts, including member 40, its cap66, washer 66-A,' member '70. This can be done by lowering handle 29 andturning it so that hooks '74, 74 will be opposite recesses '73, '78 andpushed below flange '72, the handle again turned to allow the sides ofhooks '74, '74 to abut against shoulders '78, '78 and cause the turningof member '70 to unlocked position, thereby releasing the tension onbridge piece When handle 29 has been turned sufllciently to release thepressure of gasket 48 against the inner periphery of top portion 8,flange 45 will be turned at right angles the aid of handle 29 tipped toallow for its withdrawal with the connected parts above mentioned fromtank 1.

The location of oval shaped flange 45 of member 40 being seated fromwithin casing 1 against the under surface of top portion 8 not onlyassures against its being forced off its seat but also is in a positionto utilize the pneumatic pressure from within casing 1 in sealing itsjoint.

In tightening the closing parts, it will be observed that as member '70is forced downward by the turning of handle 29, a pressure will beexerted upon bridge piece 60. Simultaneously with pressure on bridgepiece 60, washer 66-A will be forced upward, whereby to draw member 40upward, thereby sealing the joint between gasket 48 and top 8. r

The threads in member '70 and corresponding threads of bushing 69 arepredetermined to limit the allowable pressure upon bridge piece 60,beyond which would be the breaking point.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is as follows:

1. In a pressure and sealing device for containers, a casing having anopening at its top portion, a removable member suspended .within saidcasing, whereby to close said opening, a cylindrical part made integralwith said removable member, a member screw mounted to said cylindricalpart, a bushing mounted in said cylindrical part, another member havinga flange mounted within said bushing, a bridge piece engaged by saidlast named member and means whereby the turning of said last namedmember will cause said bridge piece to draw the first mentioned memberinto closed position to close the opening in said casing. v

2. In a pressure and sealing device for containers, a casing having anoval shaped opening in its top portion, a removable cover suspendedwithin said casing, a cylindrical portion formed integral with saidcover, a cap member screw mounted to said cylindrical portion, a bushingmounted within said cylindrical portion, a memto its assembled positionand with '72 of member '70. Handle 1 with the ber mounted within saidbushing, a bridge piece engaged by said last named member, a piston rodprojecting through said last named member and allowed to turnindependently thereof and said piston rod having means to engage saidlast named member, whereby to turn same to draw the bridge piece andcover towards each otherto close the opening in said casing.

3'. In a pressure and sealing device for containers, a casing having anopening at its top portion, a removable member suspended within 'saidcasing, whereby to close said opening, a member cooperating with saidremovable member, whereby to lock said removable member in closedposition, a member having a flange portion with recesses and shouldersformed thereon mounted on said cooperating member, and a rod having ahandle attached thereto and having means for engaging the flange portionof said member, whereby the turning of the handle in one direction willseal the removable member in closed position and said means attached tosaid rod, being used also as a carrying member tor said container. A a

4. In a pressure and sealing device for containers, a casing having anopening at its top portion, a removable member suspended within saidcasing, whereby to close said opening, a cylindrical part made integralwith said removable member, a member screw mounted to said cylindricalpart, a bushing mounted in said cylindrical part, another member havinga flange mounted within said bushing, abridge piece engaged by said lastnamed member, means whereby the bridge member and another screw threadedmember connected with said closing member, whereby the turning of saidthreaded members relative to each other will seal and unseal saidclosing member with reference to said casing.

WILLIAM C. PARRO'I'I.

